CHARGING SYSTEM, Diagnostic DTC:P1602

DTC Code DTC Name
P1602 Deterioration of Battery

DESCRIPTION

The generator control ECU assembly monitors battery conditions. If the voltage drops below a certain value while the engine is running (not cranking), the generator control ECU assembly determines the battery is deteriorated and stores this DTC.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P1602 Deterioration of Battery

Battery capacity is abnormally low for 10 seconds or more when the engine is running (not cranking)

(1 trip detection logic)

  • Battery

  • Wire harness or connector

  • ALT-S/ICS fuse

 Does not come on DTC stored

WIRING DIAGRAM

Refer to System Diagram.

Click here

CAUTION / NOTICE / HINT

Note

Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE


  1. CHECK CHARGING SYSTEM


    1. Check the charging system.

      Click here

      Result
      Result
      OK
      NG

    NG

    REPAIR OR REPLACE CHARGING SYSTEM

    OK

  2. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)


    1. A01KDMIC04
      *a

      Front view of wire harness connector

      (to Generator Control ECU Assembly)

      Disconnect the A58 generator control ECU assembly connector.

    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition
      A58-5 (AM21) - Body ground Always 11 to 14 V
      Result
      Result
      OK
      NG

    OK

    CHECK FOR INTERMITTENT PROBLEMS Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR